But if I uncheck show in cart then the phone numbers are shown in billto adress. If I check show in Cart then the phonenumbers are unshown in billto adress but appear at the end of pricelist as an empty field.

I don't understand the logic of this.

What I want is to disable showing phonenumbers in billto adress and also not appearing in the end of the pricelist.

It is strange. I tested it with Protostar Template, installed Virtuemart again (3.2.4) and I have still the same issue. It does not depend if checkbox "show in cart form" is set on yes or no. My first and last name is displayed anyway if I set checkbox on "No". If I set it on "Yes" it disappears in billto-adress but appears right after the "terms and conditions" again as an empty field.

Other way: Could you please tell me the php-code for showing every shopper field as it's own? So I could manage it manually which field I want to show and which not.

I just clearedall my overrides and tested this. With Show in cart form selected the fields are rendered within the cart, as you say, at the end. The code for this is within the template components/com_virtuemart/views/cart/tmpl/default_cartfields.php

Having re-read what you want to do, which is to turn off display of phone fields on the bill-to address the simplest solution is to hide them with css. Eg the following would work for the two phone fields.

Thank you for your answer! might this be a bug? because it is hidden by select "Yes" instead of "No"

Other question to this topic: How can I display the field "COM_VIRTUEMART_USER_DISPLAYED_NAME" (the Joomla register-name) in the bill to adress similar to the e-mailadress at the top? Because in my case the "name" is the company name and I don't want to have another custom field named "company name".

No it is not a bug. There are times when a field placed in the cart fields would be useful, such as "order number" for B2B sales. You are setting it to be displayed as a field in the cart form, or not to appear.

In default VM the COM_VIRTUEMART_USER_DISPLAYED_NAME or Displayed Name is shown in billto.

I have a default VM 3.2.4 installation and the joomla user name is not shown in the billto address and not shown in the page editaddresscartBT either.

could you give me a hint in which file this is defined which field of the joomla-registration (for example name, email or username) is shown in the cart-adresses? I mean for now there is only the emailaddress in my billto view.

All I want to do is to display this field in the billto-address in the cart view.

The reason why I made an override is because I don't want that a new user needs to fill in 3 fields with his names: "username", "name", "company name". Because in my case it is always the company name for every field. With this override a new user just needs to fill in "username" and "name", which is actually his company name. With this "solution" I could renounce at least one field. For example the user could fill into field "username" *companyname* and into field "name" *companyname inc. & ltd. & co*.